1979 in Roman Numerals
1979 in Roman numerals is MCMLXXIX. It is built from four parts: 1000 + 900 + 70 + 9 = M + CM + LXX + IX. Read it from left to right and add the values to get 1979. Below, 1979 appears in a date, on a copyright line and as a two-digit year.
1979 in Roman numerals is MCMLXXIX.
1979 in Roman numerals: the breakdown
| Place value | Numeral | Value |
|---|---|---|
| 1000 | M | 1000 |
| 900 | CM | 900 |
| 70 | LXX | 70 |
| 9 | IX | 9 |
| Total | MCMLXXIX | 1979 |
Why MCMLXXIX and not MDCCCCLXXVIIII?
MCMLXXIX uses the subtractive pairs CM and IX. Written by adding only, 1979 would be MDCCCCLXXVIIII, but a letter may repeat only three times in a row, and MDCCCCLXXVIIII repeats C four times.
How to read MCMLXXIX
- M is 1000.
- CM is 1000 minus 100, which is 900.
- LXX is 50 + 10 + 10, which is 70.
- IX is 10 minus 1, which is 9.
- Add 1000 + 900 + 70 + 9 to get 1979.
Roman numeral 1979 in a date
| Order | 1 January 1979 | 31 December 1979 |
|---|---|---|
| MM.DD.YYYY | I.I.MCMLXXIX | XII.XXXI.MCMLXXIX |
| DD.MM.YYYY | I.I.MCMLXXIX | XXXI.XII.MCMLXXIX |
| YYYY.MM.DD | MCMLXXIX.I.I | MCMLXXIX.XII.XXXI |
For 1 January the first two orders match, because the day and the month are both I. For any other day, order or separator, use the Roman numeral date converter with 1979 filled in.
1979 on a copyright line
© MCMLXXIX
Film and television end credits commonly show the copyright year in Roman numerals, so 1979 appears as © MCMLXXIX.
1979 as a two-digit year
As a style choice, some people write only the last two digits of a year: ’79 gives LXXIX for 1979. The full year, MCMLXXIX, is the standard form.
Facts about 1979
- 1979 is not a leap year: it is not divisible by 4.
- 1979 has 365 days.
- 1 January 1979 falls on a Monday.
- 1979 is in the 1970s.
- 1979 is in the 20th century.
Years around 1979
Convert another year
1979 = 1000 + 900 + 70 + 9 = M + CM + LXX + IX
What number is MCMLXXIX?
MCMLXXIX is the year 1979. Reading it from left to right, M is 1000, CM is 900, LXX is 70 and IX is 9, which adds up to 1979.
Questions and answers
What is 1979 in Roman numerals?
1979 in Roman numerals is MCMLXXIX. It is made of four parts: 1000 + 900 + 70 + 9 = M + CM + LXX + IX. Read MCMLXXIX from left to right, add the parts, and you get 1979. Use the converter on this page to check any other number from 1 to 3,999.
How do you write 1979 in Roman numerals?
Split 1979 into its place values, write each one in Roman numerals, and join them from largest to smallest. For 1979 that is 1000 + 900 + 70 + 9, which is M + CM + LXX + IX, so the answer is MCMLXXIX. Check that no letter repeats more than three times in a row.
What number is MCMLXXIX?
MCMLXXIX is 1979. Read it in place-value parts from left to right: M is 1000, CM is 900, LXX is 70, IX is 9. Add the parts to get 1979. Letters after a larger or equal letter are added, and a smaller letter before a larger one is subtracted. You can also type MCMLXXIX into the converter to read the number back.
Why is 1979 written MCMLXXIX and not MDCCCCLXXVIIII?
MCMLXXIX is the standard form. MDCCCCLXXVIIII breaks a rule: a letter may repeat only three times in a row, and MDCCCCLXXVIIII repeats C four times. Writing MCMLXXIX keeps every letter within those limits and makes 1979 easy to read at a glance.
How do you write 1979 on a date in Roman numerals?
Convert the month, the day and the year separately and join them with dots. For 1 January 1979 in US order that is I.I.MCMLXXIX, and for 31 December 1979 it is XII.XXXI.MCMLXXIX. The date converter lets you choose the order, the separator and a two-digit year.